ESPN CourtCast

And with Mayer improving and sticking with Djokovic in the following two sets, the man who has won the event for the past three years managed to claim the victory in straight sets.

"I'm definitely satisfied with my performance today, it was better than my first match … hopefully I'm going to continue raising my level," Djokovic said. "You have to find that mental edge in the tough moments and overcome the conditions."

David Ferrer was taken to four sets by Adrian Mannarino, but the little Spaniard was able to come through 7-6(2) 5-7 6-0 6-3 winner. Tomas Berdych also progressed with a 6-4 6-1 6-3 win over Kenny De Schepper.

Stanislas Wawrinka also came through despite a wobble in the third set, with the Swiss beating Alejandro Falla 6-3 6-3 6-7(4) 6-4.